Centrifugal Extruder, Structural Innovation And Solid Conveying And Pressurization Mechanism

Centrifugal extruder is a new type of polymer processing machine, used centrifugal force field in polymer processing. In this paper, four aspects of the equipment--- the innovation technology of centrifugal extruder, solid conveying mechanism, mathematical simulate of the distribution of solid conveying pressure and experiments are studied for the development of centrifugal extruder.It is introduced comprehensively that solid conveying, melting, mix and metering of centrifugal extruder. The innovation technology of centrifugal extruder is introduced, including main machinery, drive system, control and measuring system, heating-cooling system and seal system. And the paper lists the parameters of main operation and machinery on centrifugal extruder. There are centrifugal field, rotate speed, power, shear rate, normal stress difference in disk stage seal capability and heating transfer. Because the centrifugal extruder is a kind of the rotation equipment with high speed, the analysis of vibration is made by ANSYS software.Polymer solid conveying processing of centrifugal extruder is studied. Built mathematical simulation modal of the conveying pressure distribution, the equation expressed the conveying pressure distribution can be obtained. Otherwise, the effects of pressure distribution, including rotor drum, polymer physical properties and operational conditions on the conveying pressure distribution have been analyzed.By studied, the conclusions are gotten that by reasonable rotor drum and rotation speed, the centrifugal extruder can established the necessary solid conveying pressure; the main geometrical parameters of the rotor drum influencing on the solid conveying pressure are the diameter and slope angle of rotor drum; the friction factors between the polymer and the wall of the rotor drum or dish can influence on the solid conveying pressure distribution; the physical properties of polymer influencing on the solid conveying pressure distribution are the density and friction factor of the polymer.The equipment is designed for validating the mathematical model for calculation of the solid conveying pressure. The results of the experiments show a good coincidence with the theoretical predicts.All the preliminary investigations can provide theoretical basis for application and development of this type of polymer processing machine.